Question

Please Help! Will Receive Medal!

1. If f(x) = 8 – 10x and g(x) = 5x + 4, what is the value of (fg)(–2)?
a) –196
b) –168
c) 22
d) 78

2. If f(x) is an odd function and the graph of f(x) includes points in Quadrant IV, which statement about the graph of f(x) must be true?
a) It includes points in Quadrant I.
b) It includes points in Quadrant II.
c) It does not include points in Quadrant I.
d) It does not include points in Quadrant II.

3. If f(x) = 3x2 + 1 and g(x) = 1 – x, what is the value of (f – g)(2)?
a) 12
b) 14
c) 36
d) 38

Answer 1

1 first do F*g or fx*gx

Answer 2

Like this? --> (8-10x)(5x+4)(-2)

Answer 3

i think, sorry if im wrong but multiply first two then multiply the entire result by -2

Answer 4

I tried that and got -1.28, but it doesn't give me that option. Thanks for your help though. :) unless I'm just calculating wrong, lol.

Answer 5

oh... lemme try calculating that

Answer 6

i got 100x^2-64 im just bad i guess :P

Answer 7

Haha. Thanks for your help anyway. :)